Pseudomalachite with Quartz, Cuprite - image 1

Pseudomalachite with Quartz, Cuprite

Unknown Owner

Superb classic German specimen with lustrous bluish green botryoidal crystal groupings of pseudomalachite measuring to 1.0 cm in size on a quartz matrix with minor cuprite. In good condition. The specimen comes with an antique label as shown at the end of the video and dates to the very early 20th century.The Virneberg Mine, located near Rheinbreitbach in the Rhineland-Palatinate region of Germany, is a historic mining site situated within the Siebengebirge volcanic field. Geologically, the deposit consists of hydrothermal quartz veins that cut through Devonian-aged sedimentary rocks, primarily Devonian slates and greywackes. These veins were enriched with copper, lead, and zinc sulfides that underwent extensive oxidation near the surface, leading to a rich suite of secondary minerals. Historically, mining at Virneberg dates back to at least the 17th century, with the most intensive operations occurring during the 18th and 19th centuries before the mine finally closed in 1886. The locality is world-famous among mineralogists as the type locality for pseudomalachite, which was first described from this site in 1813. The pseudomalachite from Virneberg typically occurs as beautiful, dark emerald-green botryoidal crusts or radiating fibrous aggregates perched on a white quartz matrix. These specimens are highly valued for their historical significance and their intense, saturated color, representing a classic example of secondary copper phosphate mineralization in the German mining tradition.